Improved vise



iaitml gime W. X. STEVENS, OF EAST BROOKFIELD, MASSACHUSETTS.

Letters Patent No. 95,392, dated September 28, 1860.

IMPROVED VISE.

The Schedule referred to in these Letters Patent and making part of the same.

To whom 'it may concern:

Be it known that I, NV. X. STEVENS, of East Brookeld, in the county of \Vorcester, and State ot' Massachusetts, have invented certain new and useful Improvements in Hand-Vises; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to' the accompanying drawings, in which- Figure l is a vertical section transverse to the jaws of the vise, and

Figure 2 is a perspective view-of it. v

The object of my invention. is to produce amaehine which will serve as a parallel-jawed hand-vise', and also as a self-centring driil-chuck, having suitable shanks for both bit-stock and lathe, also for a light bench-vise. l

To these ends, my improved machine consists of a vise with two movable jaws, u a, fig. l, sliding upona crossbar,'l, by means ot' the right and left-hand screw b, whose'tln'eads work in corresponding threads in each jaw.

Said screw l) and cross-bar l are parallel, and pass through the middle piece f, which piece f serves as a handle and shank to the vise, and theeomblnation of which, with the vise described, is the main feature of my invention.

The vise is made of any suitable material, but steel is preferable.

The shank-piece f has its lower end squared and tapered to fit bitstocks;-its middle portion, for about an inch in length, is fitted for a lathe-socket; itsv up per end, for about an inch, should be square, and for good style'ot' finish, it should be the same size as the body of the jaws.

In the upper end of the shank f is a deep counter'- sink, g, central witli its body.

Cross-bar d is iitted tightly through shank f, and

firmly secured by key-pin e,` which is driven tightly through shank f, s0 as tobear in a notch in the side of cross-bar d.

This pin e also serves to keep the jaws a a at equal distances from centre g, by means of groove c, around the body of screw b, running on it. v

Screw b is turned by'means of a suitable thumblever, 71, which is keyed rmlyto it by pin l, passing through both.

AV notch is made vertically across the centre of the face of' each jaw a a, in a lille with the axis of shank j, as shown in fig. 2.

To use this instrument as a bench-vise, bore a .suitable hole in the bench and drive shank f into it.

To use it as a drill-chucleplace the shank of the drill firmly in counterbore g, turn up the thumbscrew l) until the vertical notches in jaws a a guide the drill central and hold it fast. Then place shank f in a lathe or bit-stock socket, as desired.

Its many uses as a hand-vise are too familiar to the artisan to require description. I am aware that the right'and left screw combined, has been used to move jaws for many griping-purposes; also that a parallel guide-bar is used in many vises; but I am, not aware that a shank placed central between two jaws, and connected to them by means of the binding-screw, and parallel bar, has ever before been used. Therefore,

What I claim as my invention, and wish to secure by Letters Patent, is-

' The combination of the vise and shank, substantially as described, for the purposes specified.

,In testimony whereof, I have signed my name to this specification, before two subscribing witnesses. NV. X. STEVENS.

Witnesses ',l. O. OONNOLLY,

' Luos. S. MERCER. 

